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help for ^collin^
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Collinearity Diagnostics
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    ^collin^ varlist  [^if^ exp] [^in^ range] [, ^corr rinv^]



Description
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^collin^ computes several collinearity diagnostic measures including
       VIF, tolerance, eigenvalues, condition index, and R-squared.  
       It will compute the eigenvalues and condition index on either 
       the raw SSCP with an intercept (default) or the deviation SSCP 
       without an intercept.

Option
------

^corr^   Eigenvalues and condition index computed from correlation matrix
         without a constant. 
        
      By default the eigenvalues and condition index are computed on the
      scaled raw score SSCP matrix with an intercept.
        
^rinv^  display inverse of correlation matrix.

Examples
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 . ^collin read write math^
 . ^collin read write math, corr rinv^
 . ^collin read write math if gender==1^
 . ^collin read write math if e(sample)
 


Author
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      Philip B. Ender
      UCLA Department of Education
      UCLA, Academic Technology Services
      ender@@ucla.edu 


Also see
--------

 Manual:  ^[R] regression diagnostics^
On-line:  help for @vif@

